Recap: 10.4.8 was causing me problems, mainly with Eudora and SuperDuper, but also with general program crashes. I asked for help "rolling back" to 10.4.7. I did this by doing an Archive and Install of 10.4 from disk, and then immediately applying the 10.4.7 COMBO updater. Short answer: worked like a charm! No more crashes and things are much better now. Longer answer: It is a bit of a pain. Took a couple of hours to reinstall, run the updater, and clean up some things that got lost in the translation (spotlight privacy, apps flagged as 'first time running,' and setting up chron jobs). But overall, well worth the effort. Thanks to all, especially, Linda, Matt, Eddie, John, and Randy for their very helpful suggestions. -Bob >>>Okay, 10.4.8 pretty much s*cks. IE no longer runs, Spotlight >>>privacy is flaky, and I am seeing crashes in Eudora and SuperDuper >>>that I've never had before. SD tech support says this is a know >>>apple-introduced bug causing their failures. >>> >>>So what's the process for backing out 10.4.8 to the earlier >>>release? 10.4.7 was stable as can be for me. This is on a macbook >>>pro if that matters.